ATF2 weekly meeting

Wednesday 29 Jul 2009, 14:30 → 16:30 Asia/Tokyo

Minutes ( draft, 7/30 ) d090729.html

14:30 → 15:30 International phone/webex meeting

14:30 Reconstruction of electronic noise and beam fluctuations using strip-line and cavity BPMs

Further analysis of reproducibility of offsets in strip-line BPMs

Speaker: Mr Yves Renier (LAL)

Slides orbit_reconstruction.pdf

14:50 Progress report on multi-OTR fabrication and confirmation of planned schedule for installation

Speakers: Dr Angeles Faus-Golfe (Instituto de Fisica Corpuscular - Valencia), Doug McCormick (SLAC)

Slides Multi_OTR_July09.pdf Multi_OTR_July09.ppt

15:30 → 16:30 KEK site meeting (Japanese)

15:30 Progress of Shintake monitor work

Speakers: Mr Masahiro OROKU (Tokyo Univ.), Mr Takashi Yamanaka (The University of Tokyo)

Slides Progress_of_the_Shintake_Monitor_Work_090729.pdf Progress_of_the_Shintake_Monitor_Work_090729.ppt

Time: 15:30(JST)~ Participants: Tauchi, Okugi, Kuroda, Kubo, Yamanaka, Oroku, Kamiya(WebEx) * Enlargement of the Laser Hut Q: where will you put the power supply unit of the laser which will be put in the extended laser hut? A: In the laser hut. In principle a power supply unit should be put outside of the laser hut to avoid vibration and heat source. However the present(old) laser will be put in the extended laser hut and it will be used only if an emergency arises. * IP target holder - It will be possible to limit the stroke of insertion stage to 100 mm by shorteing the holder length. * Correlation between laser position (angle) and phase - It seems that the feedback of the laser position is needed to stabilize the phase. Q: Is it possible to do the position feedback with the devices in hand? A: Yes. We have laser position detectors and motorized mirrors. Q: How can you explain this correlation? A: I think this is due to the change of the laser path length by the change of the laser angle. Q: If that so, the change of the phase should be the quadratic of the laser angle (Measured data shows it is linear.) A: It seems. I can't answer now.